16_lgm - Last Glacial Maximum Site 607- North Atlantic IG...

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Last Glacial Maximum Raymo, 1994 Site 607- North Atlantic Holocene 5c MIS 2/1 IG G
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Last Glacial Maximum LGM = 22 – 14 ky Deglaciation = 14-10 ky Holocene = 10 ky on Peak deglacial= 6-7 ky LGM Most recent glaciation (most detailed record) Largest ice volume Ruddiman 13-3
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LGM Today LGM Ice = 14.2 x 10 km Ice = 35 x 10 km Laurentide ~ 55% of vol (~AA today)
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LGM Ruddiman 12-17
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LGM Paleomap Project- Scotese
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LGM Sea level Different locations 100-130m 110 m lower Based on coral reef drilling 129 m – CLIMAP 120 m – Fairbanks (1989)- Barbados
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LGM Snowlines Broecker and Denton, 1989 Cordillera of N and S America Depressed 600 – 1000 m globally
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LGM Orbital Configuration Similar to today Ice sheets were developing in response to earlier minimum Sluggish response of ice sheets Maintenance of cold climate by feedbacks (GH gases)
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LGM- Orbital Configuration Ruddiman 12-1
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LGM- Orbital Configuration Ruddiman, 2003
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LGM Temperatures (CLIMAP- 1970-80’s)
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16_lgm - Last Glacial Maximum Site 607- North Atlantic IG...

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